Method of handling weft ends of weft carriers



Junez, 1931. R- R TURNER 1,807,717

METHOD OF HANDLING WEFT ENDS OF WEFT CARRIERS Filed Aug. 14, 1930 FILI' A #UPA/5K5 Patented June 2, 1931 UNITED STATES RICHARD TURNER, OF WORCESTER, FIASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOVLES LOOM WORKS, F 1N0BESTER, I-EASSACIIUSETTS, A COR- PORATION 0F MASSACHUSETTS METHOD 0F HANDLING WEFT ENDS OF WEFT CARRIERS Application filed August 14, 1930. Serial No. 475,283.

This invention relates to improvements in methods for manipulating the ends of` weft threads from bobbins such as may be employed on double shuttle weft replenishing looms, and it is the general object of the in vention to provide a method which will facilitate the insertion of a loop of tied ends into one or both of a pair of bobbins.

It is a further object of my invention to improve the method of handling weft ends in a replenishing magazine by not only tying the ends together but by inserting a portion of the tied ends into a part ofthe weft carrier.

With these and other objects in view which f will appear as the description proceeds my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. l is a vertical section through a portion of the magazine having bobbins arranged with their ends disposed` according to the e present invention,

Fig. 2 is a vertical section through a pair of bobbins showing the manner of disposing the tied ends within one of the bobbins,

Fig. 3 is a view similar to Fig. 2 but with the loops of the weft ends extending into both bobbins,

Fig. 4 is a diagrammatic view setting forth the method of drawing the tied ends into a bobbin, f

Fig. 5 shows an intermediate step between the beginning and finishing of the process, with the weft end beingdrawn into one of the bobbins, Y

Fig. 6 is a side elevation of a clip used in carrying out my invention,

Fig. 7 is a front elevation taken in the direction of arrow 7, Fig. 6, and

Fig. 8 is a view similar to Fig. 4 but illustrating the manner in which the loop may be drawn into both bobbins. Y

Itsometimes occurs in the practice of the invention set forth in Patent 1,756,709 that the weft ends will become tight so that insufficient Weft remains to allow a bobbin to move from the magazine to the empty shuttle without breaking the tied ends, this being due to rotation of the bobbins on their axes as they await transfer. Also, the tied ends 0f a pair of bobbins above the transfer mechanism occasionally falls from between the bobbins to a point in the path of a lower bobbin being transferred, resulting in breakage. My present invention is to be practiced in connection with the loom described in the aforesaid patent to which reference may be had for a more complete description in the manner in which the weft bobbins with their ends tied together act under varying conditions to effect continuous weaving ina weft replenishing loom. y

Referring to Fig. l, upper and lower shuttles S and S lie horizontally opposite transferrers ll and l2, respectively, which form part of a magazine M. A guideway 10 in the magazine receives the bobbins which are arranged in pairs, the weft ends of each pair beingtiedtogether. Mypresentinvention contemplates inserting the weft ends within one or both of the bores 13 of a pair, the upper and lower bobbins being shown at B and B', respectively.

. In carrying my method into effect I may employ a structure such as that set forth diagrammatically in Fig. 4. A table 2() has projecting vertically upwardly therefrom a small post 21 to the upper end of which is secured a pair of spring clips 22 having opposed normally contaeting points 23 above which are Haring sides 24 defining a notch 25 into which a weft end may fall. The post 2l and the structure carried at the upper end thereof are sufficiently small to enter the bore of the bobbin and are long enough so that when a bobbin is placed with its butt on the table the opposed points 23 will be above the end of the bobbin. A knotter designated generally at 26 may be supported suitably and have operating connections 27 with a foot operated lever 28.

VJhen practicing the present method the operator will grasp a pair of bobbins from which extend weft ends W and W', respectively and lead said ends to Jthe knotter 26, holding the bobbins in one hand and the weft ends in the other. Vilhcn leading the weft ends to the knotter the operator will cause the threads to enter the notch 25 and pass below the spring points 23. `When the thread is in this position the two ends may be held in operative relation with respect tothe knotter 26 "which vcan be operated by depressing lever 2S, thus uniting the weft ends lV and W by a neat weavers knot. The bobbins are then iaisedtogether,the loop extending from tnebohbinstothe knottei reeving under the points 23 and being drawn into the bore of one of the bobbins. Then the end ofthe loop is reached the points 23 will spring apart due to their resilience and the loop willpassont of the notch 25, remaining` in the bobbin as shown in Fig.--2.

The distancebetween the bobhinsand the knetter will ordinarily be slightly less than the length ofthefbobbin, or will be so proportioned that theloop which remains `after the threads aretied together will extend for substantially the length of the bobbin without projecting beyond`=thev butt `where it might become worn fvibiation of the bobbin against structure tleniiig'tlie guideway l0. By making the knotter adjustable aste position the methodv can be practiced with respect to bobbins of practically any length.

Fig. illustrates an intermediate position of the bobbins as they are being movedupwardly during the practice of my method, the'knot approaching "the bobbins-as the loop isk drawn into4 one of them.

lVhe/n it i's desired to arrangeithe endsA of the bobbins as showninFig. 3,'my above described method willbe carried out in connection withftwo posts similarto 2l and designated herein at 40. Each post will be equipped with a device similar to that mountedon'thetop post 2l,^and theknotter will be placed at substantially twice its distance from the bobbins because'of the Vfact that there are-to' be two loops, one drawn into each bobbin, and there will therefore be need for practically twice as much weft'to 'form the two loops.

While I have shown Aa particular for-1n ot vclip in Figs. (i and 'i' yet nxy invention can be practiced successfully with any forni of yielding holder which will serve to draw the loep 'of weft intoa bobbin and release itwhen the end reaches the yielding part of the holder. For this reason I do not wish to be limited to the structure shown herein.

At the time of bobbin transfer' in the looni, one of the pairs'will be movedbj.'Y its corresponding l" transferrer into the associated shuttlev and the "weftv enidwillbe drawn out of the bore in the bobbin. My method contemplates` the insertion of the weft ends into the bobbin preparatory to transfer as well as the particular method 'by which it is accomplished herein vith respect to the knetter. The neat knot may be drawn into the fabric without causing a serious defect such as would result if the ends beyond the knot were left uncut.

From the foregoing it will be seen that I have provided a simple method for inserting a loop of weft `formed by tying two weft ends together `into one or both of a pair of bobbins. It will also be seen that I have provided a` method for improving weaving which consists in vinserting tlie'tied ends into one or both ofthe bobbi-ns-` Having thus descrihed my infention'it will he seen that changesand modiiications may be made therein by those skilled in the art without departing'from the spirit and scope of the invention and I do not wish to be limitedtothe details herein disclosed, but what I claim is:

l. The method of controlling` weft ends in a weft'replenishing mechanism which consists in providing two bobbins having a continuous weft `wound thereon, inserting a reserve of weft in one of said bobbins, and transferring one of said bobbins and leaving the other to act as a thread holder for the transferred bobbin.

2. The method of controlling weft ends in a weft replenishing mechanism which consists in tying the ends of weft extending from two reserve'bobbins, inserting a portion of the tied ends into one'of the bobbins, and transferring one of the bobbins and leaving the other `iin-transferred, the uri-transferred bobbin acting as a thread holderto resist the pull ofithe weft of the transferred bobbin on the pick'followingltransfer.

3. The method of controlling weft endsin a weftlreplenishing mechanism which consists intying the ends of Vtwo bobbins together, inserti-ng aportion ofthe tied ends into one of the pair so that movement o'" either bobbin awayfrom the other will withdraw'the; endfrom the bobbin, and transferring one lbobbinnnd leaving the other to act as a threadholder therefor.

4. The methodof controlliirg weft ends in a weft replenishing mechanism which consists i'ntyinfg the weft ends of a pair of bobbi-ns together forming a loop, drawing the loop into one of the bohbins, and transferring one bobbin and leaving the other to act as a thread holder therefor.

5. The method of controlling weft ends in a weft replenishing loom which consists in tying the weft ends of a pair of bobhins together, forming a 'pair of loops in the rweft ends, inserting oneloop in one of the bobbins and the Vother loop inthe other bobbin, and transferring one 'bobbin -and leaving `the other to act as -av thread 4holder therefor.

6. The method of drawing weft ends into yone of a pair of bobbins'which consists in drawing off -a predeterminedamount of weft from each bobbin, tying said weft ends together toform a loop,"and 'drawing said loop into one of the bobbins.

7. The method of drawing tied weft ends into a bobbin which consists in drawing off a predetermined amount` oit weft from each bohbin, tying said weft ends together at a distance from the loobbin not greater than the length of the bobbin to form a loop, and drawing the loop into one of the bobbins.

8. The method of drawing tied weft ends into bobbins of equal length which consists in drawing a predetermined amount of weft from each bobbin, tying said weft ends to` gether at a distance Jfrom the bobbins not to exceed double the lenffth of one of the bobbins, and drawing suustantially equal portions of said tied ends into each bobbin.

In testimony whereof I have hereunto af- Xed my signature.

RICHARD GREENLEAF TURNER. 

